fairchild



UNITED STATES -PATENTl;OFF.UCE"

imeeevemsur iN WATER-WHEELS,

Specification forming paz-t of Letters Patent N o. 26,200, dated May 11,1858.

l'e it known that i, d, FLJRCHILD, of Jericho, in the county of(Llitteudeu and Stute ci' lf'erinontiuve invented e new ind usefulImprovement in Neter-llhecls; and i. do hereby declare that thefollowing' is a. full, clear, and exact description of the same, reference being had te the annexed drawings, making a part of thisspecification, in Which- Figure l is n, vertiealseetion ci thestationary parts of my improve-nient. Fig. 2 is aplan or top View of thesame.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention relates to en improvement in that class of Walter-'Wheelsin which the unter is marde to not upon the Wheel. by in eens of ritmosp herie pressure or suction produced by el vacuum formed in u draft-tubebelow the Wheel. lire Yertieu consists in the peeulir ecnstructi er: thewheel and gates irrconnection. with Lire draft-tube, eshereinafterfullyshown l le cribed,wl1ere by the Wheel .rend d'n'rlysimple in construction und i me.. c

To enable rhone shi nrt to fully understand and wirt. ,'cntion, l' willproceed to describe A represents zij" zontelshaftis pinnen; n which theshaft ii pui Y l y i his box C is provided zu; esl-,eh devritli ctubular projection nin which screuflenges D D are' itted, one in` each,the being fitted snugly in the projections r., still allowed io turnfreely ihereiri.d The screws D D are permanently attached ilo the D, andforni the Wheel. On the shaft B tivo circuler disks E E are placedlooselym These disks are equal in diameter to the-tubuiurprojectiens c(mind form the gutes of the wheel. These gates' may be operated oradjusted by :my proper ineens.

lirepresenis a tube which is attached to the under side of the penstoeirA.y said tube cemmuuicuting,r with the box C, rliiis tube i? is madesufficiently erge 'se its lower end will at ull. times ue immersed inthe iailucc (l,

. through con iine myself to any particular mat rial, as

the whole may be formed of metaLif esired.

The operation 'is as follows: The gates E E being` opened the desiredwidth,'tl1e waren passes through the screws D D into the vbox C and downthe tube F, and as the screws D D are always submerged, the'bottom ofthe penstoek A being as low as the reservoir of water; and as the lowerend of the tube F is always submerged in the tcil-race,`it follows as ametter of courscithat a. partial vacuum will be formed in tube l1 as thewater passes through contracted spaces formed by the screws D-into alarg-e1; space l?, und conscquen tly the water will be suspended thereinto n, height proportionate to that of perfect vucuu in, and the velocitywith which the water would otherwise fell from the wheel were the tube Fnot employed is communicated to the water above, which acts by motion oratmospheric pressure, no percussive force being employed. The gates E?in consequence .of be` ing constructed and arranged es shown, may

be readily adjusted so as to admit un y desired volume of Water on thewheels. f

The draft or motion' tube F has been previously used, end I believe wasfirst employed in what is known as the Jonvzil turbine Wheel, and haslately been employed in connection with other wheels; but so far es I am@were the ordinary tub or horizontal wheels have been used in connectionwith the drafttube, and guide-orifices have been necessarily exfuployedto eeusethe water to actin the proper direction upon the buckets, theguide-orifices being placed over the wheel.` Other parts are alsonecessarily used in order Ato adapt the draft-tube to the ordinarytub'or horizontzil Wheels. By my improvement the draft-tube is employed,its full benefit obtained bya very steady movement of the Wheel withI amaxiuiuin power fully equal if not greater than others, and at the sainetime the construction of the Whole is rendered extremely simple.

'lhe screws D require no guide-milices, as the The screws D D, gaies E'E, tubular projections c, c may be of cest metal, and the shaft I4 donot,' however,

Water will act u'pon then-1l perfectly as. it is drawn .through theminto the box C and tube F.

I do not claim separately the draft-tube F, for that has been previouslyused; but

What -I claim as new, and desire to secure by Letters Patent, is-

. 1. The` tube F, in combination with the wheel., formed of the screws DD, placed on a shaft B, and working within the -tubular projections d a,the whole beim,r arranged to operate as described;

2. In combination with the wheel and drafttube, the gates E E, arrangedas described. J. H. FAIRCHILD.

- Witnesses: y

' DAVID FISH, S. M.-BARNY.

